Population
Service age groups
About this topic
Service age groups divide the population into broad life-stage bands such as children, young adults, working-age adults, and older people. The groupings are designed to reflect typical demand for age-based services and facilities rather than exact five-year cohorts.
This view is useful for planning childcare, schools, recreation, aged services, and other community infrastructure. It works best alongside five year age groups, household type, and dwelling data, which add more detail about who is living in an area and how needs may change over time.
Interpretation notes
- This is a derived grouping rather than a direct Census question, so the age bands are planning-oriented summaries built from standard age data.
- Percentages relate to the total population; use five year age groups when exact cohort detail matters.
Related topics
Key insight
In 2021, Empty nesters and retirees (60 to 69) was the most common category among residents in Wilmington (part), accounting for 19.6% (131 people). This share was lower than Mount Remarkable (DC) (21.9%). Since 2016, the biggest change was in Empty nesters and retirees (60 to 69), which increased by 32 people and 2.6 percentage points.
Section overview
Age structure - Service age groups
Wilmington (part) - Total persons (Usual residence)
This table summarises service age groups for Wilmington (part) in 2021 for persons, with comparison against Mount Remarkable (DC) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Wilmington (part), with comparison markers for Mount Remarkable (DC).
Babies and pre-schoolers (0 to 4)
2021 count
46
% of total
6.9%
Change from 2016
+1.6pp
46
6.9%
+1.6pp
Primary schoolers (5 to 11)
2021 count
55
% of total
8.2%
Change from 2016
+0.3pp
55
8.2%
+0.3pp
Secondary schoolers (12 to 17)
2021 count
39
% of total
5.8%
Change from 2016
-1.9pp
39
5.8%
-1.9pp
Tertiary education and independence (18 to 24)
2021 count
37
% of total
5.5%
Change from 2016
0.0pp
37
5.5%
0.0pp
Young workforce (25 to 34)
2021 count
54
% of total
8.1%
Change from 2016
+1.6pp
54
8.1%
+1.6pp
Parents and homebuilders (35 to 49)
2021 count
104
% of total
15.6%
Change from 2016
-1.1pp
104
15.6%
-1.1pp
Older workers and pre-retirees (50 to 59)
2021 count
104
% of total
15.6%
Change from 2016
-4.2pp
104
15.6%
-4.2pp
Empty nesters and retirees (60 to 69)
2021 count
131
% of total
19.6%
Change from 2016
+2.6pp
131
19.6%
+2.6pp
Seniors (70 to 84)
2021 count
102
% of total
15.3%
Change from 2016
+0.7pp
102
15.3%
+0.7pp
Elderly aged (85 and over)
2021 count
14
% of total
2.1%
Change from 2016
+0.4pp
14
2.1%
+0.4pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
+15
+1.6pp
Primary schoolers (5 to 11)
+9
+0.3pp
Secondary schoolers (12 to 17)
-6
-1.9pp
Tertiary education and independence (18 to 24)
+5
0.0pp
Young workforce (25 to 34)
+16
+1.6pp
Parents and homebuilders (35 to 49)
+7
-1.1pp
Older workers and pre-retirees (50 to 59)
-11
-4.2pp
Empty nesters and retirees (60 to 69)
+32
+2.6pp
Seniors (70 to 84)
+17
+0.7pp
Elderly aged (85 and over)
+4
+0.4pp
Data table
Service age groups for Wilmington (part). Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Mount Remarkable (DC).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Mount Remarkable (DC)% | Count | % | Mount Remarkable (DC)% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 46 | 6.9% | 3.9% | 31 | 5.3% | 3.9% | +15 | +1.6pp |
| Primary schoolers (5 to 11) | 55 | 8.2% | 6.3% | 46 | 7.9% | 7.2% | +9 | +0.3pp |
| Secondary schoolers (12 to 17) | 39 | 5.8% | 6.6% | 45 | 7.7% | 6.4% | -6 | -1.9pp |
| Tertiary education and independence (18 to 24) | 37 | 5.5% | 4.2% | 32 | 5.5% | 5.3% | +5 | 0.0pp |
| Young workforce (25 to 34) | 54 | 8.1% | 7.2% | 38 | 6.5% | 6.4% | +16 | +1.6pp |
| Parents and homebuilders (35 to 49) | 104 | 15.6% | 13.3% | 97 | 16.7% | 15.3% | +7 | -1.1pp |
| Older workers and pre-retirees (50 to 59) | 104 | 15.6% | 17.0% | 115 | 19.8% | 19.1% | -11 | -4.2pp |
| Empty nesters and retirees (60 to 69) | 131 | 19.6% | 21.9% | 99 | 17.0% | 17.8% | +32 | +2.6pp |
| Seniors (70 to 84) | 102 | 15.3% | 16.8% | 85 | 14.6% | 15.1% | +17 | +0.7pp |
| Elderly aged (85 and over) | 14 | 2.1% | 2.7% | 10 | 1.7% | 3.0% | +4 | +0.4pp |
| Total | 667 | 100.0% | 100.0% | 581 | 100.0% | 100.0% | +86 | 0.0pp |